{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:75M34HQBJWC6YAH2YK4FNGX2FC","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0e23c4d7e7eab5013741b50177d948d8ce839bc8dde4fb9292e9f86004859755","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-17T18:25:43Z","title_canon_sha256":"6eac94ba5d989b4fc2f69a0022a0edc1ff94675d49eca6c4bd51fb9384abc6b5"},"schema_version":"1.0","source":{"id":"1907.07708","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07708","created_at":"2026-07-04T23:52:00Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07708v1","created_at":"2026-07-04T23:52:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07708","created_at":"2026-07-04T23:52:00Z"},{"alias_kind":"pith_short_12","alias_value":"75M34HQBJWC6","created_at":"2026-07-04T23:52:00Z"},{"alias_kind":"pith_short_16","alias_value":"75M34HQBJWC6YAH2","created_at":"2026-07-04T23:52:00Z"},{"alias_kind":"pith_short_8","alias_value":"75M34HQB","created_at":"2026-07-04T23:52:00Z"}],"graph_snapshots":[{"event_id":"sha256:115d0aba74107e52076df8081be84e19469cbc739f3de47660e1c0af6aa78053","target":"graph","created_at":"2026-07-04T23:52:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1907.07708/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Extragalactic peaked-spectrum radio sources are thought to be the progenitors of larger, radio-loud active galactic nuclei (AGN). Synchrotron self-absorption (SSA) has often been identified as the cause of their spectral peak. The identification of new megahertz-peaked spectrum sources from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey provides an opportunity to test how radio sources with spectral peaks below 1 GHz fit within this evolutionary picture. We observed six peaked-spectrum sources selected from the GLEAM survey, three that have spectral characteris","authors_text":"H. J. A. R\\\"ottgering, J. R. Callingham, M. A. Keim","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-17T18:25:43Z","title":"Extragalactic megahertz-peaked spectrum radio sources at milliarcsecond scales"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07708","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:17471317d55962609f11d98d9303d91795a51573fb205e63939eababc31a335f","target":"record","created_at":"2026-07-04T23:52:00Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0e23c4d7e7eab5013741b50177d948d8ce839bc8dde4fb9292e9f86004859755","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-07-17T18:25:43Z","title_canon_sha256":"6eac94ba5d989b4fc2f69a0022a0edc1ff94675d49eca6c4bd51fb9384abc6b5"},"schema_version":"1.0","source":{"id":"1907.07708","kind":"arxiv","version":1}},"canonical_sha256":"ff59be1e014d85ec00fac2b8569afa28a0ed6bbc0b0ea4de6656f3fa923e3dc8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ff59be1e014d85ec00fac2b8569afa28a0ed6bbc0b0ea4de6656f3fa923e3dc8","first_computed_at":"2026-07-04T23:52:00.453818Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:52:00.453818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G81mNgp2Mm7Mstl4jvkFYMHKK164SsbHWzfUKwr8aUe8CUDUFxnYgZwRD6Fs621ZJiwDwUJR1gZOLnd6bge7Bg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:52:00.454287Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.07708","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:17471317d55962609f11d98d9303d91795a51573fb205e63939eababc31a335f","sha256:115d0aba74107e52076df8081be84e19469cbc739f3de47660e1c0af6aa78053"],"state_sha256":"551a7dbb2cefd1fd38f11d29c4864d6a71555ff358b209704da8d376f3f8559b"}